Nine Months Ended September 30, 2023 vs. Nine Months Ended September 30, 2022
NOI for our Same-Store Community properties increased 7.3%, or $53.2 million, for the nine months ended September 30, 2023 compared to the same period in 2022. The increase in property NOI was attributable to a 6.7%, or $70.3 million, increase in property rental income, partially offset by a 5.2%, or $17.1 million, increase in operating expenses. The increase in property rental income was primarily driven by a 7.4%, or $72.5 million, increase in rental rates and a 6.2%, or $7.1 million, increase in reimbursement and ancillary and fee income, partially offset by a $3.0 million increase in bad debt based on probability of collection, a $3.8 million increase in occupancy loss, and a $2.7 million increase in concessions. Weighted average physical occupancy decreased by 0.3% to 96.6% and total monthly income per occupied home increased by 7.0% to $2,499.
The increase in operating expenses was primarily driven by an 11.4%, or $7.0 million, increase in repair and maintenance expense due to the increased use of third party vendors as a result of an increase in the number of homes that were turned as well as the impact of inflation on those third party vendor costs and weather related events, a 12.3%, or $5.4 million, increase in utilities, which was primarily due an increase in energy costs, and a 3.2%, or $4.2 million, increase in real estate taxes due to higher assessed valuations, partially offset by a $1.5 million decrease in personnel costs primarily due to a refundable payroll tax credit related to the Employee Retention Credit program.
The operating margin (property net operating income divided by property rental income) was 69.5% and 69.1% for the nine months ended September 30, 2023 and 2022, respectively.
Non-Mature Communities/Other
UDR’s Non-Mature Communities/Other represent those communities that do not meet the criteria to be included in Same-Store Communities, which include communities recently developed or acquired, redevelopment properties, sold or held for disposition properties, and non-apartment components of mixed use properties.
Three Months Ended September 30, 2023 vs. Three Months Ended September 30, 2022
The remaining 4.5%, or $12.5 million, of our total NOI during the three months ended September 30, 2023 was generated from our Non-Mature Communities/Other. NOI from Non-Mature Communities/Other decreased by 4.8%, or $0.6 million, for the three months ended September 30, 2023 as compared to the same period in 2022. The decrease was primarily attributable to a $7.3 million decrease in sold and held for disposition communities NOI due to the partial sale of four operating communities in 2023, partially offset by a $4.0 million increase in stabilized, non-mature and development communities NOI due to development communities completed in 2022 and 2023, and a $2.3 million increase in acquired communities NOI.
Nine Months Ended September 30, 2023 vs. Nine Months Ended September 30, 2022
The remaining 5.7%, or $47.5 million, of our total NOI during the nine months ended September 30, 2023 was generated from our Non-Mature Communities/Other. NOI from Non-Mature Communities/Other increased by 42.4%, or $14.1 million, for the nine months ended September 30, 2023 as compared to the same period in 2022. The increase was primarily attributable to a $13.7 million increase in stabilized, non-mature communities NOI due to development communities completed in 2022 becoming stabilized, a $3.8 million increase in non-residential/other NOI due to changes in straight-line rent as a result of a decrease in tenant rent concessions and a $2.3 million increase in acquired communities NOI, partially offset by a $7.4 million decrease in sold and held for disposition communities NOI due to the partial sale of four operating communities in 2023.
Gain/(loss) on sale of real estate owned
For the nine months ended September 30, 2023, the Company recognized gain/(loss) on sale of real estate owned of $325.9 million compared to no gain/(loss) on sale of real estate owned for the nine months ended September 30, 2022. The increase in 2023 as compared to 2022 was attributable to the partial sale of four operating communities located in various markets during the nine months ended September 30, 2023.
Income/(loss) from unconsolidated entities